The effect of soil temperature on allopathic of Brassica napus and Hordeum vulgare residues: the study of the growth of Hordeum spontaneum Koch and Amaranthus retroflexu

Document Type : Research Paper

Authors

1 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Tehran, Karaj, Iran.

2 Agronomy and Plant Breeding Dept., Faculty of Agriculture, University of Tehran, Karaj, Iran.

Abstract

Keeping and returning plant residues to the soil not only improves the physical and chemical structure of the soil, but the presence of chemical compounds of the residues can also reduce the germination and growth of weeds. In this regard, a factorial experiment based on randomized complete blocks design with three replications was conducted at the experimental greenhouse of agricultural research station of the college of agriculture and natural resources, university of Tehran in 2019-2020. Treatments include three levels of plant residues (no-residues, residues of Brassica napus and Hordeum vulgare), two types of soil (no-sterile and sterile), three levels of soil temperature (25, 35 and 45oc) and two types of weed (Amaranthus retroflexus and Hordeum spontaneum). By increasing the temperature from 25 to 45oc, the final emergence percentage and emergence rate of weed seedling in the no-residues increased and in the treatments with Brassica and Hordeum residues decreased. In both sterile and no-sterile soils, the highest final emergence percentage (76.1 and 66.1%) and emergence rate of weed seedling (0.12 and 0.11 inverse time in 50% seedling emergence) were observed in the no-residues. Also in sterile soil, the mentioned treatment was very different from the treatments of Brassica and Hordeum residues. Although the allelopathic effect of Brassica napus to controlling the emergence of the Hordeum spontaneum and Amaranthus retroflexus compared to Hordeum vulgare was grater, however, both crops were able to disrupt the germination of the weeds.

Keywords

Main Subjects

Iranian Journal of Weed Science
Volume 19, Issue 2
January 2024

Files

Share

How to cite

Statistics